Spark-plug



SPARK PLUG.

,19121101110111111211 SEPT. 18. 1919.

1,389, 1 52. K Patented Aug. 30, 1921.`

A TUR/VEYS PATENT OFFICE.

i ROBERT WILLIAM MOORE, OF sa. LOUIS, MISSOURI.

SPARK-rime.

Specification'of Letters Patent.

Patented Aug. 30, 1921.

Application filed September 18, 1919; Serial No. 324,385. f

T 0 all w hom it may com-era o Be it known that I, ROBERT TV. MOORE, acitizen of the United States, residing at St. Louis, -in the State ofMissou-ri, have invented new and useful Improvements in Spark-Plugs, ofwhich the fol-lowing is a specification. l

My invention relates to spark plugs for use in connection with internalcombustion engines. f

An important object of the invention is to provide a Spark plug vwhichmay be quickly and conveniently cleaned without the use of tools, whilethe same is installed upon the 7cylinder of the engine,` and withoutseparating the elements of the spark plugs. Y y

Otherl objects and advantages of the invention will be apparent duringlthe course of the following description.

In the accompanying `drawings forming a part of this specification, and-in which like numerals are employed to designate like parts throughoutthe same,

Figure 1 is a side elevation of a spark plug einbodyingmy invention, Y

Fig. l2 is a central longitudinal sectional view through the same,

Fig. 3 is a horizontal section taken on line 3--3 of Fig. 2,

Fig. 4 is a simi-larview showing a 4dii?- erent iorin of cleaningelement,

Fig. 5 is a similar view showing .a still different form ofk cleaningelement,

Fig. 6 is a plan view of a stop cap, and Fig. 7 is a top plan view of acarrier.

In the drawings, wherein for theV purpose of illustration is shown apreferred embodiment of the same, Athe numeral 1() designates the bodyportion of the spark plug, which is polygonal so that it may beconveniently engaged by a wrench. The body portion 1() may be formed ofmetal and carries an exteriorly screw -.-threaded tubular extension 11,to engage within the screw-threaded opening in the cylinder 01:.

the engine. A copper washer 12 engages the lower end oi' the bodyportion 10, as shown.

The body portion 10 has a screw-threaded central longitudinal opening13, for receiving the screw-threaded portion 14 of a tubular carrier 15.This carrier is provided at its upper end with a handle or handlesY 16,for convenient turning of the same.

The carrier 15 is provided near the screwthreaded portion 14 with `anYannular flange 17, provided with diametrically foppositely arrangedlugs`1`8, to be passed through openings or notches 19, in the flange 20,Oi' a stop cap 21. This stop cap has screwthreaded engagement at 22,with the body portion 10. The stop cap serves to prevent the accidentalseparation of the carrier 15 and body portion 10.

Arranged within the tubular carrier 15 is an insulating sleeve 23,formed of porcelain orthe like, and held therein by a ring or bushing24, screw-threaded to the carrier. The insulating sleeve receives andholds an electrode or firing pin 25, the upper end o-r' which yisscrew-threaded for the reception of a bind-ing nut 26, having a washer27 therebeneath. The lower end of the `electrode 25 is arranged nearvand spaced from an yelectrode 28 or firing pin, electrically connectedwith the extension 11.

The body portion 10 is provided with an interior annular chamber 29,through which the lower portionBO of lthe insulating element Or sleeve23 passes. A cleaning 'element or disk 31 is arranged within the chamber29 and has aA recess 32 for the reception of the portion 30. This recesshas its contacting face' 33 serrated or roughened. The disk 31 isprovided in its -periphery with a notch 34, receiving an anchor pin 35,holding the same against displacement. The disk 31 is yurged inwardlytoward the portion 30 by a 'compressible coil spring 36, held within anadjustable housing 37, having screw-threaded engagement within anopening 38. The tension oli the spring 36 may be regulated by turningVthe housin@ 37.

Tn Fig. 4 the spring 36 and housing 37 are omitted and a leaf 'spring 39substituted therefor.

In Fig. 5, thecleaning element is in the form of a spring, bent toprovide oppositely arranged arms 40, having blades 41, contacting withthe portion 30. The spring is bent to form an eye 42, receiving the pin35.

In all forms of the invention it will be noted that the cleaning elementproper embodies a yoke-like structure having a cleaning portion and isspring actuated into engageinent with the insulating sleeve and itselectrode.

In the use of the device, while the body portion 10 remains in placeuponthe cylinder, the carrier l5 is rotated, which causes the insulatingelement 23 to be moved longitudinally and turned, whereby the portion 30moves in contact with the cleaning element and the carbon is cleaned orscraped therefrom.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of my invention, or thescope of the subj oined claims.

Having thus described my invention, I claim 1. A spark plug orP thecharacter described, comprising a tubular body portion interiorlyscrew-threaded and provided with an interior chamber', a tubular carrierhaving a screwthreaded portion engaging within the tubular body portion,a flange formed upon the carrier and having stop lugs, a stop capsecured to the body portion and having a iiange provided with openingsfor the passage of the lugs, an insulating sleeve held withinthecarrier, a cleaning element arranged within the interior chamber andvengaging the insulating sleeve, and an electrode arranged within theinsulating sleeve, and a coacting electrode arranged near the firstnamed electrode.

2. A spark plug o'l the character described, comprising a body portionhaving a screwthreaded open and interior chamber, a carrier havingscrew-threaded engagement within the screw-threaded opening, aninsulating sleeve held by the carrier, an electrode arranged within theinsulating sleeve, a coactiug electrode arranged near the iirst namedelectrode, a cleaning element held within the interior chamber andengaging the insulating sleeve, a housing having screw-threadedengagement with the body portion, and a coil spring held within thehousing and engaging the cleaning element.

3. A spark plug of the character described comprising a body portionhaving an opening therethrough and a chamber therein, a carrier mountedin said opening, an insulating sleeve held by the carrier, an electrodearranged within said insulating sleeve, a coacting electrode arrangednear the iirst named electrode, a cleaning element arranged Within theinterior chamber and engaging the insulating sleeve and spring means formaintaining said cleaning element in engagment with said insulatingsleeve.

4. A spark plug of the character described comprising a body portionhaving an opening therethrough and a chamber therein, a

Vcarrier mounted in said opening, an insulating sleeve held by thecarrier, an electrode arranged Within said insulating sleeve, a coactingelectrode arranged near the first named electrode, and a spring-actuatedcleaning element arranged Within the interior chamber having cleaningportions in engagement with the insulating sleeve.

5. A spark plug of the character described comprising a body portion, aninsulating sleeve movable with respect to said body portion, anelectrode arranged within said insulating sleeve, a coacting electrodearranged near the first named electrode, a cleaning element engaging theinsulating sleeve, and spring means for maintaining said cleaningelement in engagement with said insulating sleeve.

6. A spark plug of the character described comprising a movableelectrode, a coacting electrode arranged near said movable electrode, acleaning element engaging said movable electrode, and spring means formaintaining said cleaning element in engagement with said electrode.

7. In a spark plug of the character described, a cleaning elementcomprising a spring actuated yoke-like structure having cleaningportions adapted to engage the electrode oit' the spark plug.

8. A spark plug of the character described comprising a body portionhaving an opening therethrough and a chamber therein, a carrier mountedin said opening, an insulating sleeve held by the carrier, an electrodeVarranged within said insulating sleeve, a coacting electrode arrangednear the first named electrode, a cleaning element arranged within theinterior chamber and engaging the insulating sleeve, and spring meansfor maintaining the cleaning element in engagement with the insulatedsleeve manually operable means for actuating said carrier whereby thecleaning element traverses the insulating sleeve. Y

ROBERT WILLIAM MOORE.

